BIOGENIC INFLUENCES ON THE FORMATION AND LONG-TERM DYNAMICS OF COHESIVE SEDIMENTS

摘要: Biogenic stabilization processes that result in the formation of biofilms and interparticle-networks can significantly alter transport characteristics finegrained sediment layers. The increase threshold motion amount to up several hundred percent. While planctic organisms are involved depositing flocs early stages consolidation, secondary consolidation is controlled by microbial breakdown processes, leading changes mechanical properties cohesive sediments. primary stage completed days, last for decades. A preliminary series erosion tests an annular flume revealed demonstrated biogenic impact formation. Surrogate materials were used simulate governing natural soft